I did the copy work for a commercial lab. We did everything that David does. I used Fuji provia and a lower contrast (ie Astia, which is no longer) chrome film. You want to avoid Valvia because its a saturated film. I'd either process normal or push a 1/3rd for contrast. We had strobes to use. Depending on the work, I polarized the work when needed. For copy from books. I would not use it. For oil painting, I would.
Use a lens shade.